CN115336157B - Circuit for a switched capacitor voltage converter - Google Patents

Circuit for a switched capacitor voltage converter Download PDF

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Publication number
CN115336157B
CN115336157B CN202180024623.0A CN202180024623A CN115336157B CN 115336157 B CN115336157 B CN 115336157B CN 202180024623 A CN202180024623 A CN 202180024623A CN 115336157 B CN115336157 B CN 115336157B
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switch
circuit
sub
capacitor
closed
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CN115336157A (en
Inventor
汉斯·梅瓦特
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Lion Semiconductor Inc
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Lion Semiconductor Inc
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0043—Converters switched with a phase shift, i.e. interleaved
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • H02M3/072—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps adapted to generate an output voltage whose value is lower than the input voltage

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

A circuit, comprising: a first switch having: a First Side (FS) connected to the second side (1C 2S) of the first capacitor; and a Second Side (SS) connected to the Reference Node (RN); a second switch having: FS connected to the second voltage node (2 VN); and an SS connected to 1C 2S; a third switch having: FS connected to the first side (1C 1S) of the first capacitor; and an SS connected to the 2 VN; a fourth switch having: FS connected to the third voltage node (3 VN); and an SS connected to 1C 1S; a fifth switch having: FS connected to the second side (2C 2S) of the second capacitor; and an SS connected to the RN; a sixth switch having: FS connected to 3 VN; and an SS connected to the 2C 2S; a seventh switch having: FS connected to the first side (2C 1S) of the second capacitor; and an SS connected to the 3 VN; and an eighth switch having: FS connected to the first voltage node; and an SS connected to the 2C 1S.

Description

Circuit for a switched capacitor voltage converter
Cross Reference to Related Applications
The present application claims priority from U.S. provisional patent application No. 63/001,154, filed on even 27, 3/2020, which is incorporated herein by reference in its entirety.
Background
The switched capacitor voltage converter (switched capacitor voltage converter) is a convenient circuit for converting one DC voltage level to another. For example, in some embodiments, such a voltage converter may be used to charge a battery in a mobile device. Therefore, the need for a switched capacitor voltage converter is very large.
Thus, there is a need for new and improved switched capacitor voltage converters.
Disclosure of Invention
According to some embodiments, a circuit for a switched capacitor voltage converter is provided.
In some embodiments, a circuit for a switched capacitor voltage converter is provided, the circuit comprising a first sub-circuit comprising: a first capacitor having a first side and a second side; a fourth capacitor having a first side and a second side; a first switch having a first side connected to the second side of the first capacitor and having a second side connected to the reference node; a second switch having a first side connected to the second voltage node and having a second side connected to the second side of the first capacitor; a third switch having a first side connected to the first side of the first capacitor and having a second side connected to the second voltage node; a fourth switch having a first side connected to the third voltage node and having a second side connected to the first side of the first capacitor; a fifth switch having a first side connected to the second side of the fourth capacitor and having a second side connected to the reference node; a sixth switch having a first side connected to the third voltage node and having a second side connected to the second side of the fourth capacitor; a seventh switch having a first side connected to the first side of the fourth capacitor and having a second side connected to the third voltage node; and an eighth switch having a first side connected to the first voltage node and having a second side connected to the first side of the fourth capacitor; and a second sub-circuit comprising: a second capacitor having a first side and a second side; a third capacitor having a first side and a second side; a first switch having a first side connected to the second side of the second capacitor and having a second side connected to the reference node; a second switch having a first side connected to the second voltage node and having a second side connected to the second side of the second capacitor; a third switch having a first side connected to the first side of the second capacitor and having a second side connected to the second voltage node; a fourth switch having a first side connected to the third voltage node and having a second side connected to the first side of the second capacitor; a fifth switch having a first side connected to the second side of the third capacitor and having a second side connected to the reference node; a sixth switch having a first side connected to the third voltage node and having a second side connected to the second side of the third capacitor; a seventh switch having a first side connected to the first side of the third capacitor and having a second side connected to the third voltage node; and an eighth switch having a first side connected to the first voltage node and having a second side connected to the first side of the third capacitor.
In some of these embodiments, the reference node is grounded.
In some of these embodiments, during the first configuration: the first switch of the first sub-circuit is closed; the second switch of the first sub-circuit is turned off; the third switch of the first sub-circuit is closed; the fourth switch of the first sub-circuit is opened; the fifth switch of the first sub-circuit is opened; the sixth switch of the first sub-circuit is closed; the seventh switch of the first sub-circuit is turned off; the eighth switch of the first sub-circuit is closed; the first switch of the second sub-circuit is opened; the second switch of the second sub-circuit is closed; the third switch of the second sub-circuit is opened; the fourth switch of the second sub-circuit is closed; a fifth switch of the second sub-circuit is closed; the sixth switch of the second sub-circuit is turned off; the seventh switch of the second sub-circuit is closed; and the eighth switch of the second sub-circuit is opened.
In some of these embodiments, during the second configuration: the first switch of the first sub-circuit is closed; the second switch of the first sub-circuit is turned off; the third switch of the first sub-circuit is closed; the fourth switch of the first sub-circuit is opened; the fifth switch of the first sub-circuit is opened; the sixth switch of the first sub-circuit is closed; the seventh switch of the first sub-circuit is turned off; the eighth switch of the first sub-circuit is closed; the first switch of the second sub-circuit is opened; the second switch of the second sub-circuit is closed; the third switch of the second sub-circuit is opened; the fourth switch of the second sub-circuit is closed; a fifth switch of the second sub-circuit is closed; the sixth switch of the second sub-circuit is turned off; the seventh switch of the second sub-circuit is closed; and the eighth switch of the second sub-circuit is opened.
In some of these embodiments, the first switch of the first sub-circuit, the second switch of the first sub-circuit, the third switch of the first sub-circuit, the fourth switch of the first sub-circuit, the fifth switch of the first sub-circuit, the sixth switch of the first sub-circuit, the seventh switch of the first sub-circuit, the eighth switch of the first sub-circuit, the first switch of the second sub-circuit, the second switch of the second sub-circuit, the third switch of the second sub-circuit, the fourth switch of the second sub-circuit, the fifth switch of the second sub-circuit, the sixth switch of the second sub-circuit, the seventh switch of the second sub-circuit, and the eighth switch of the second sub-circuit are comprised of one or more MOSFETs.
In some of these embodiments, the first voltage node receives an input voltage and the second voltage node outputs an output voltage.
In some of these embodiments, the second voltage node receives an input voltage and the first voltage node outputs an output voltage.
In some of these embodiments, the circuit is used to form a multiphase voltage converter.
Drawings
Fig. 1 illustrates an example schematic diagram of a circuit for a switched capacitor voltage converter in accordance with some embodiments.
Fig. 2 illustrates an example schematic diagram of the circuit for the switched capacitor voltage converter of fig. 1 in a first configuration, in accordance with some embodiments.
Fig. 3 illustrates an example schematic diagram of the circuit for the switched capacitor voltage converter of fig. 1 in a second configuration, in accordance with some embodiments.
Detailed Description
Turning to FIG. 1, an example of a circuit for a switched capacitor voltage converter is shown in accordance with some embodiments100. As shown, circuit 100 includes two sub-circuits 102 and 104. Node V in subcircuits 102 and 104 1 Is connected together, node V in sub-circuits 102 and 104 2 Is connected together and is connected to node V in sub-circuits 102 and 104 3 Are connected together.
In some embodiments, V 1 Is an input node connected to a voltage source, V 2 Is the output node connected to the load and circuit 100 is at V 2 Where an output voltage is provided, which is at V 1 One quarter of the input voltage at that point. In other embodiments, V 2 Is an input node connected to a voltage source, V 1 Is the output node connected to the load and circuit 100 is at V 1 Where an output voltage is provided, which is V 2 Four times the input voltage.
The circuit 100 includes four capacitors C 1 、C 2 、C 3 And C 4 And sixteen switches S 1A 、S 2A 、S 3A 、S 4A 、S 5A 、S 6A 、S 7A 、S 8A 、S 1B 、S 2B 、S 3B 、S 4B 、S 5B 、S 6B 、S 7B And S is 8B 。
In some embodiments, any suitable capacitor may be used for capacitor C 1 、C 2 、C 3 And C 4 . For example, in some embodiments, the capacitor may be formed on a chip or may be a discrete component.
In some embodiments, capacitor C 1 、C 2 、C 3 And C 4 May have any suitable value. For example, in some embodiments, the capacitor may have a value between 1nF and 1 mF.
Any suitable switch may be used for switch S 1A 、S 2A 、S 3A 、S 4A 、S 5A 、S 6A 、S 7A 、S 8A 、S 1B 、S 2B 、S 3B 、S 4B 、S 5B 、S 6B 、S 7B And S is 8B . For example, in some embodiments, the switch may be formed from one or more MOSFETs, which are driven by any suitable driver under the control of any suitable circuitry.
During operation, the switches of circuit 100 may be opened and closed to switch between circuit configurations 200 and 300 shown in fig. 2 and 3, respectively.
During operation, the circuit 100 may switch between the two configurations at any suitable frequency. For example, in some embodiments, the circuit may switch between these two configurations at a frequency between 1kHz (e.g., for a 1mF capacitor size) and 1GHz (e.g., for a 1nF capacitor size).
The following table shows the switch S as in configurations 200 and 300 1A 、S 2A 、S 3A 、S 4A 、S 5A 、S 6A 、S 7A 、S 8A 、S 1B 、S 2B 、S 3B 、S 4B 、S 5B 、S 6B 、S 7B And S is 8B Is set up by:
switch Configuration 200 Configuration 300
S 1A Closure Disconnecting
S 2A Disconnecting Closure
S 3A Closure Disconnecting
S 4A Disconnecting Closure
S 5A Disconnecting Closure
S 6A Closure Disconnecting
S 7A Disconnecting Closure
S 8A Closure Disconnecting
S 1B Disconnecting Closure
S 2B Closure Disconnecting
S 3B Disconnecting Closure
S 4B Closure Disconnecting
S 5B Closure Disconnecting
S 6B Disconnecting Closure
S 7B Closure Disconnecting
S 8B Disconnecting Closure
In some embodiments, the circuit 100 may be used to form a multiphase voltage converter. In such an embodiment, multiple copies of the circuit 100 may be provided and their input and output nodes connected together (i.e., V for all of the circuits 100 1 The connectors are connected together and V of all circuits 100 2 The connectors are connected together). In some embodiments, the switches of different circuits may be switched out of phase such that different circuits 100 switch from one configuration to another at different times.
While the present invention has been described and illustrated in the foregoing exemplary embodiments, it is to be understood that this disclosure is made only by way of example and that numerous changes in the details of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which is limited only by the following claims. The features of the embodiments of the present disclosure may be combined and rearranged in various ways.

Claims (8)

1. A circuit for a switched capacitor voltage converter, comprising:
a first sub-circuit, comprising:
a first capacitor having a first side and a second side;
a fourth capacitor having a first side and a second side;
a first switch having a first side directly connected to a second side of the first capacitor and having a second side connected to a reference node;
a second switch having a first side connected to a second voltage node and having a second side connected to a second side of the first capacitor;
a third switch having a first side connected to a first side of the first capacitor and having a second side connected to the second voltage node;
a fourth switch having a first side connected to a third voltage node and having a second side directly connected to the first side of the first capacitor;
a fifth switch having a first side directly connected to the second side of the fourth capacitor and having a second side connected to the reference node;
a sixth switch having a first side connected to the third voltage node and having a second side connected to a second side of the fourth capacitor;
a seventh switch having a first side connected to the first side of the fourth capacitor and having a second side connected to the third voltage node; and
an eighth switch having a first side connected to a first voltage node and having a second side directly connected to the first side of the fourth capacitor; and
a second sub-circuit, comprising:
a second capacitor having a first side and a second side;
a third capacitor having a first side and a second side;
a first switch having a first side directly connected to a second side of the second capacitor and having a second side connected to the reference node;
a second switch having a first side connected to the second voltage node and having a second side connected to a second side of the second capacitor;
a third switch having a first side connected to the first side of the second capacitor and having a second side connected to the second voltage node;
a fourth switch having a first side connected to the third voltage node and having a second side directly connected to the first side of the second capacitor;
a fifth switch having a first side directly connected to the second side of the third capacitor and having a second side connected to the reference node;
a sixth switch having a first side connected to the third voltage node and having a second side connected to a second side of the third capacitor;
a seventh switch having a first side connected to the first side of the third capacitor and having a second side connected to the third voltage node; and
an eighth switch having a first side connected to the first voltage node and having a second side directly connected to the first side of the third capacitor.
2. The circuit of claim 1, wherein the reference node is grounded.
3. The circuit of claim 1, wherein, during the first configuration:
a first switch of the first sub-circuit is closed;
the second switch of the first sub-circuit is turned off;
a third switch of the first sub-circuit is closed;
a fourth switch of the first sub-circuit is turned off;
a fifth switch of the first sub-circuit is opened;
a sixth switch of the first sub-circuit is closed;
a seventh switch of the first sub-circuit is turned off;
an eighth switch of the first sub-circuit is closed;
the first switch of the second sub-circuit is opened;
a second switch of the second sub-circuit is closed;
a third switch of the second sub-circuit is opened;
a fourth switch of the second sub-circuit is closed;
a fifth switch of the second sub-circuit is closed;
a sixth switch of the second sub-circuit is turned off;
a seventh switch of the second sub-circuit is closed; and
the eighth switch of the second sub-circuit is opened.
4. The circuit of claim 1, wherein, during the second configuration: a first switch of the first sub-circuit is opened;
a second switch of the first sub-circuit is closed;
a third switch of the first sub-circuit is turned off;
a fourth switch of the first sub-circuit is closed;
a fifth switch of the first sub-circuit is closed;
a sixth switch of the first sub-circuit is turned off;
a seventh switch of the first sub-circuit is closed;
an eighth switch of the first sub-circuit is opened;
a first switch of the second sub-circuit is closed;
a second switch of the second sub-circuit is turned off;
a third switch of the second sub-circuit is closed;
a fourth switch of the second sub-circuit is opened;
a fifth switch of the second sub-circuit is opened;
a sixth switch of the second sub-circuit is closed;
a seventh switch of the second sub-circuit is turned off; and
the eighth switch of the second sub-circuit is closed.
5. The circuit of claim 1, wherein the first switch of the first sub-circuit, the second switch of the first sub-circuit, the third switch of the first sub-circuit, the fourth switch of the first sub-circuit, the fifth switch of the first sub-circuit, the sixth switch of the first sub-circuit, the seventh switch of the first sub-circuit, the eighth switch of the first sub-circuit, the first switch of the second sub-circuit, the second switch of the second sub-circuit, the third switch of the second sub-circuit, the fourth switch of the second sub-circuit, the fifth switch of the second sub-circuit, the sixth switch of the second sub-circuit, the seventh switch of the second sub-circuit, the eighth switch of the second sub-circuit are formed from one or more MOSFETs.
6. The circuit of claim 1, wherein the first voltage node receives an input voltage and the second voltage node outputs an output voltage.
7. The circuit of claim 1, wherein the second voltage node receives an input voltage and the first voltage node outputs an output voltage.
8. The circuit of claim 1, wherein the circuit is used to form a multiphase voltage converter.
CN202180024623.0A 2020-03-27 2021-03-26 Circuit for a switched capacitor voltage converter Active CN115336157B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US202063001154P 2020-03-27 2020-03-27
US63/001,154 2020-03-27
PCT/US2021/024263 WO2021195451A1 (en) 2020-03-27 2021-03-26 Circuits for switched capacitor voltage converters

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CN115336157B true CN115336157B (en) 2023-08-04

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US11567519B2 (en) * 2020-09-08 2023-01-31 Samsung Electronics Co., Ltd. Voltage dividing capacitor circuits, supply modulators and wireless communication devices

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US11581806B2 (en) 2023-02-14
WO2021195451A1 (en) 2021-09-30
GB202212528D0 (en) 2022-10-12
US20210305895A1 (en) 2021-09-30
GB2607811A (en) 2022-12-14
CN115336157A (en) 2022-11-11

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